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Surface Structure and Electronic Property of Reduced SrTiO3 (100) Surface Observed by STM/STS
Published online by Cambridge University Press: 15 February 2011
Abstract
We have obtained STM images and STS data with atomic-scale resolution for SrTIO3 (100) surface annealed in UHV at 1200 °C. A √5×√5-R26.6° surface superstructure indicating oxygen vacancy ordering has been observed. The STS data provide evidence for a localized surface state arising from oxygen vacancies at 1.35 eV below the Fermi level. STM images of the √5×√5 structure correspond to the surface orbital of the ordered Ti-oxygen vacancy.
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- Copyright © Materials Research Society 1993